Rail air conditioner electric heating device and rail air conditioner

Abstract

The utility model provides a kind of track air conditioner electric heating device and track air conditioner, which comprises: main circuit, for heating, including first group heating circuit and second group heating circuit;Control circuit, for controlling main circuit, including first control circuit and second control circuit, the first control circuit and the second control circuit, respectively control the first group heating circuit and the second group heating circuit;The input end of the first group heating circuit and the second group heating circuit is connected to the input power supply of the main circuit after being connected in parallel, and the first group heating circuit and the second group heating circuit can be independently controlled.The problem of low reliability and insufficient installation space of the existing track air conditioner electric heating device is solved.

Description

Technical Field

[0001] This utility model relates to the field of track air conditioning, specifically providing a track air conditioning electric heating device and a track air conditioner. Background Technology

[0002] Currently, the electric heating method used in track air conditioning can quickly reach the set heating temperature and is unaffected by low external temperatures. However, it suffers from low safety and reliability. Excessive temperatures can damage surrounding components and automatically cut off the power, causing the entire heating system to stop working. Existing technologies improve the reliability of electric heating by increasing the number of electric heating devices in the track air conditioning system. However, multiple electric heating devices require more installation space, thus increasing costs.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a highly reliable and low-cost electric heating device for track air conditioning and track air conditioning. By splitting the components of the same heating device into two circuits and connecting them in parallel to the same main power supply, the cost is reduced while achieving the effect of using the backup circuit for heating in case of failure, thereby improving reliability.

[0005] To achieve the above objectives, this utility model first provides an electric heating device for track air conditioning, the technical solution of which is as follows:

[0006] The main circuit, used for heating, includes a first group of heating circuits and a second group of heating circuits; the control circuit, used for controlling the main circuit, includes a first control circuit and a second control circuit, the first control circuit and the second control circuit respectively controlling the first group of heating circuits and the second group of heating circuits; the input terminals of the first group of heating circuits and the second group of heating circuits are connected in parallel and then connected to the input power supply of the main circuit, and the first group of heating circuits and the second group of heating circuits can be controlled independently.

[0007] Furthermore, the first heating circuit includes a first contactor, a first heating component, a first primary temperature control switch, and a first secondary temperature control switch; the second heating circuit includes a second contactor, a second heating component, a second primary temperature control switch, and a second secondary temperature control switch.

[0008] Furthermore, the first-level temperature control switch and the first-level temperature control switch act on the first control loop and the first group of heating circuits, respectively. When either the first-level temperature control switch or the first-level temperature control switch is disconnected, the first group of heating circuits malfunctions. Similarly, the second-level temperature control switch and the second-level temperature control switch act on the second control loop and the second group of heating circuits, respectively. When either the second-level temperature control switch or the second-level temperature control switch is disconnected, the second group of heating circuits malfunctions.

[0009] Furthermore, in the first group of heating circuits, the operating temperatures of the first-level temperature control switch and the first-second temperature control switch are different; in the second group of heating circuits, the operating temperatures of the second-level temperature control switch and the second-second-level temperature control switch are different.

[0010] Furthermore, the first heating component and the second heating component may have the same or different power.

[0011] Furthermore, it also includes a control unit for sending control signals to the first contactor and / or the second contactor to control the operating state of the first group of heating circuits and / or the second group of heating circuits.

[0012] Furthermore, the first heating circuit also includes a first circuit breaker, which is connected in series with the first contactor, the first heating component, and the first secondary temperature control switch; the second heating circuit also includes a second circuit breaker, which is connected in series with the second contactor, the second heating component, and the second secondary temperature control switch.

[0013] The second objective of this utility model is to provide a track-mounted air conditioner, which adopts the following technical solution:

[0014] A track air conditioner, wherein the track air conditioner is equipped with the aforementioned track air conditioner electric heating device.

[0015] Furthermore, it also includes a heat pump system; a temperature detection module for detecting the ambient temperature; and a control module for controlling the track air conditioning electric heating device to operate and heat if the ambient temperature is lower than a first preset temperature, and controlling the heat pump system to operate and heat if the ambient temperature is higher than the first preset temperature.

[0016] Furthermore, the heat pump system includes a compressor and a compressor electric heating belt; before controlling the heat pump system to operate for heating, the control module confirms whether to turn on the compressor electric heating belt based on the ambient temperature; if the ambient temperature is lower than a second preset temperature after the compressor has been started for a preset time, the control module adjusts the operating frequency of the compressor.

[0017] After adopting the above technical solution, the track air conditioning electric heating device and track air conditioner provided by this utility model have the following beneficial effects compared with the prior art:

[0018] The electric heating device for track air conditioning provided by this utility model divides the main circuit into a first group of heating circuits and a second group of heating circuits connected in parallel, and sets two-stage temperature control switches on each of the two groups of heating circuits. This allows the other group of heating circuits to be activated immediately when one group of heating circuits fails, improving the reliability of the electric heating device. Furthermore, the electric heating device for track air conditioning provided by this utility model only adds two-stage temperature control switches to the original electric heating device, without requiring additional components or extra installation space, thus reducing production costs. The track air conditioner provided by this utility model also adjusts the heating mode of the track air conditioner according to the ambient temperature, controlling the operation of the heat pump system or the electric heating device. This allows the track air conditioner to heat in electric heating mode at low temperatures, improving heating efficiency; and to heat in heat pump mode at high temperatures, reducing power consumption and saving heating costs. Attached Figure Description

[0019] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the attached diagram:

[0021] Figure 1 This is a circuit module diagram of an electric heating device for a track air conditioner provided by this utility model;

[0022] Figure 2 This is an electrical schematic diagram of an electric heating device for a track air conditioner provided by this utility model;

[0023] Figure 3 This is a flowchart of the operation of a track air conditioner provided by this utility model.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] This utility model provides an electric heating device for a track air conditioner, comprising: a main circuit for heating, including a first group of heating circuits and a second group of heating circuits; a control circuit for controlling the main circuit, including a first control circuit and a second control circuit, wherein the first control circuit and the second control circuit control the first group of heating circuits and the second group of heating circuits, respectively; the input terminals of the first group of heating circuits and the second group of heating circuits are connected in parallel and then connected to the input power supply of the main circuit, wherein the first group of heating circuits and the second group of heating circuits can be controlled independently.

[0029] The first and second heating circuits of the main circuit are connected in parallel at their input terminals and share the same power supply. During operation, the heat generated by the resistor heats the air flowing through it, and this heated air is then transported into the carriage through the air duct.

[0030] like Figure 1 As shown, Figure 1 The locations of the power supply and air duct are not shown in the illustrated embodiment. It can be understood that in this schematic diagram, the left ends of the first and second contactors are connected to the power supply, and the electric heater is installed in the air conditioner evaporator cavity.

[0031] Furthermore, the first heating circuit includes a first contactor, a first heating component, a first primary temperature control switch, and a first secondary temperature control switch; the second heating circuit includes a second contactor, a second heating component, a second primary temperature control switch, and a second secondary temperature control switch.

[0032] also, Figure 1In the illustrated embodiment, all components in the first heating circuit are connected in series, and all components in the second heating circuit are also connected in series. In other embodiments, the components in the first and second heating circuits may have other connection methods.

[0033] It should be noted that, in addition to the core heating component and the two-stage temperature control switch, the first and second heating circuits also include a first contactor and a second contactor for controlling the on / off state of the heating circuits. These contactors are used to receive control signals to change the operating state, thereby changing the operating state of the first and / or second heating circuits.

[0034] like Figure 1 and Figure 2 As shown, the installation location and connection sequence of the contactor vary depending on the number and installation location of components in the heating circuit. Figure 1 As shown, the first contactor is connected to the first heating resistor, and the second contactor is connected to the second heating resistor.

[0035] Figure 2 The schematic diagram on the right does not show the installation positions of the heating resistor and the secondary temperature control switch; therefore, the discussion will focus only on the connection relationship between the contactor and the primary temperature control switch. In the first heating circuit, the two contacts of the first contactor K41 are A1 and A2, and the two contacts of the first primary temperature control switch TS1 are 43 and 44. In the second heating circuit, the two contacts of the second contactor K42 are A1 and A2, and the two contacts of the second primary temperature control switch TS2 are 63 and 64.

[0036] Note: It should be noted that the codes and component locations are set for ease of description, and the actual settings can be adjusted according to different situations in actual applications. The accompanying drawings and text descriptions are not intended to limit the scope of the concept of this patent in any way, but rather to illustrate the concept of this patent to those skilled in the art by referring to specific embodiments.

[0037] Furthermore, the first and second heating circuits can be selectively activated, with the deactivated circuit serving as an emergency or backup circuit. The first and second heating circuits can also be activated or deactivated simultaneously, allowing the electric heating device to operate at different power levels according to heating needs, thus achieving multi-level adjustment.

[0038] It should be noted that in existing technologies, two sets of heating components typically share a single primary and secondary temperature control switch. In this case, if either the primary or secondary temperature control switch fails, neither set of heating components can function properly. However, in this embodiment, the first and second heating circuits each use their own primary and secondary temperature control switches, enabling independent control of both circuits.

[0039] Furthermore, the first-level temperature control switch and the first-level temperature control switch act on the first control loop and the first group of heating circuits, respectively. When either the first-level temperature control switch or the first-level temperature control switch is disconnected, the first group of heating circuits malfunctions. Similarly, the second-level temperature control switch and the second-level temperature control switch act on the second control loop and the second group of heating circuits, respectively. When either the second-level temperature control switch or the second-level temperature control switch is disconnected, the second group of heating circuits malfunctions.

[0040] Figure 1 In the embodiment shown, all components in the first heating circuit are connected in series, the first heating component is connected to the first secondary temperature control switch, and the first primary temperature control switch is connected in series in the first heating circuit; all components in the second heating circuit are connected in series, the second heating component is connected to the second secondary temperature control switch, and the second primary temperature control switch is connected in series in the second heating circuit.

[0041] Figure 2 In the illustrated embodiment, the first-level temperature control switch is connected to the first control circuit, and the first-level temperature control switch acts on the first control circuit; the second control circuit is connected to the second-level temperature control switch, and the second-level temperature control switch acts on the second control circuit. The components within the dashed box are the electric heating assembly and components mounted on the electric heating frame in this track air conditioner.

[0042] If the operating temperatures of the first-stage temperature control switch and the first-stage temperature control switch are different, the first-stage temperature control switch opens when the first set temperature is met and automatically resets when the temperature drops to the second set temperature; the first-stage temperature control switch may or may not reset. If the operating temperatures of the second-stage temperature control switch and the second-stage temperature control switch are different, the second-stage temperature control switch opens when the first set temperature is met and automatically resets when the temperature drops to the second set temperature; the second-stage temperature control switch may or may not reset.

[0043] It should be noted that the first set temperature corresponding to the first-level temperature control switch and the second-level temperature control switch can be the same or different, and the same applies to the second set temperature.

[0044] Taking the first heating circuit as an example, if one of the first-level temperature control switches or the first-level temperature control switch fails, the second heating circuit can be started in time to ensure that the heating function is not interrupted, avoid the complete paralysis of the system, and buy time for maintenance.

[0045] Furthermore, in the first heating circuit, the operating temperatures of the first primary temperature control switch and the first secondary temperature control switch are different; in the second heating circuit, the operating temperatures of the second primary temperature control switch and the second secondary temperature control switch are different.

[0046] As described above, the two-stage temperature control switches in the heating circuit act on the main circuit and the control circuit respectively, enabling layered control logic when the temperature reaches different values, thus ensuring the safety of electric heating.

[0047] Taking the first heating circuit as an example, assume the operating temperature of the first-stage temperature control switch is 60℃ and the operating temperature of the first-stage temperature control switch is 140℃. When the temperature rises to 60℃ due to voltage fluctuations, excessive instantaneous starting current, etc., the first and second-stage temperature control switches are triggered, briefly cutting off the first heating circuit. After the current stabilizes and the temperature drops, it automatically resumes operation, avoiding frequent tripping that affects use. When continuous overload occurs due to short circuits, component adhesion, sudden power failure, etc., and the temperature rises to 140℃, the first and second-stage temperature control switches are triggered, completely cutting off the first heating circuit, preventing the circuit from catching fire or the non-metallic materials in the evaporation chamber from being ignited.

[0048] Furthermore, the first heating component and the second heating component may have the same or different power.

[0049] Based on the above, multi-level control can be achieved by combining the working states of the first and second heating circuits.

[0050] If the power of the first heating component and the second heating component are the same, two-level control can be achieved by controlling the working state of the first heating circuit and the second heating circuit; at the same time, local overheating or overcooling can be avoided during operation.

[0051] If the first heating element and the second heating element have different power ratings, three-level control can be achieved by controlling the operating states of the first and second heating circuits. When lower heating power is required, only the heating circuit corresponding to the lower-power heating element can be activated; when medium heating power is required, only the heating circuit corresponding to the higher-power heating element can be activated; and when higher heating power is required, both heating circuits can be activated simultaneously.

[0052] Furthermore, it also includes a control unit for sending control signals to the first contactor and / or the second contactor to control the operating state of the first group of heating circuits and / or the second group of heating circuits.

[0053] In addition, Figure 2 In the illustrated embodiment, the location of the air duct is not shown. The air conditioning controller integrates a control unit and a power supply, used to output two control signals, DO1 and DO2. The DO1 signal controls the first contactor K41 to engage, thereby controlling the operating state of the first heating circuit; the DO2 signal controls the second contactor K42 to engage, thereby controlling the operating state of the second heating circuit.

[0054] By incorporating contactors into the heating circuit, remote control of the circuit's on / off state can be achieved, improving work efficiency. Furthermore, contactors can be used in conjunction with temperature sensors and control units to automate the heating circuit's operation.

[0055] For example, when the temperature sensor detects that the temperature is lower than the set value, the control unit energizes the contactor coil through a control signal, the main contacts close, and the heating circuit starts to work; when the temperature reaches the set value, the control unit de-energizes the contactor coil through a control signal, the main contacts open, and the heating circuit stops working, thereby realizing automatic temperature regulation.

[0056] It should be noted that the first and second level temperature control switches in this embodiment are mechanical temperature control switches.

[0057] Specifically, the temperature detection unit can be a temperature sensor such as a thermistor, and it is also used to convert the detected temperature of the heating component into a temperature signal.

[0058] Furthermore, the first heating circuit also includes a first circuit breaker, which is connected in series with the first contactor, the first heating component, and the first secondary temperature control switch; the second heating circuit also includes a second circuit breaker, which is connected in series with the second contactor, the second heating component, and the second secondary temperature control switch.

[0059] like Figure 2 As shown, in this embodiment, the first heating circuit and the second heating circuit are both three-phase AC circuits, single-phase AC circuits, or DC circuits. Taking the first heating circuit of the three-phase AC circuit as an example, the first circuit breaker CB41 is connected to the first contactor K41, the first contactor K41 is connected to the first heating component, and one end of the first heating component is connected to the first secondary temperature control switch FU1.

[0060] It should be noted that, Figure 2 In the embodiment shown on the left, a two-stage temperature control switch has been drawn in the three-phase AC circuit. Although a first-stage temperature control switch has not been drawn, since the first-stage and second-stage temperature control switches have the same function, it can be understood that when either temperature control switch is turned off, the heating circuit is disconnected.

[0061] It is understandable that when a short circuit occurs in a three-phase balanced load, the U-phase and W-phase circuits are disconnected. Although the V-phase circuit is not disconnected, current will still flow through the V-phase during a three-phase short circuit, effectively cutting off the circuit due to the disconnection of the U / W-phase circuits. This reduces costs and the number of components. In other embodiments, two-stage temperature control switches can be installed in all three-phase AC circuits.

[0062] Figure 2In the embodiment shown, the dashed box represents the core component of the track air conditioning heating circuit.

[0063] Because temperature control switches only respond to abnormal temperature conditions and cannot handle circuit faults such as short circuits or overloads; contactors are controlled by signals to open and close circuits and lack self-protection. If a short circuit or overload occurs, the contactor cannot actively disconnect and may burn out due to continuous high current. This embodiment adds a circuit breaker for overload and short circuit protection, forming a multi-level, multi-functional safety protection and control system, improving the safety and reliability of the heating circuit.

[0064] This utility model also provides a track air conditioner, which is equipped with the above-mentioned track air conditioner electric heating device.

[0065] Furthermore, it also includes a heat pump system; a temperature detection module for detecting the ambient temperature; and a control module for controlling the track air conditioner electric heating device to operate and heat if the ambient temperature is lower than a first preset temperature, and controlling the heat pump system to operate and heat if the ambient temperature is higher than the first preset temperature.

[0066] like Figure 3 As shown, the track air conditioner includes an electric heating device and a heat pump system, supporting both heat pump heating and electric heating modes. While the electric heating mode consumes more electricity, its heating efficiency is unaffected by low temperatures, whereas the heat pump heating mode consumes less electricity, its heating efficiency is affected by low temperatures. Therefore, by using a temperature detection module to monitor the ambient temperature and a control module to select the appropriate heating mode based on that temperature, heating efficiency can be improved while reducing power consumption and saving costs.

[0067] Specifically, if the ambient temperature is lower than the first preset temperature, it indicates that the outside temperature is low, and an electric heating mode is used to improve heating efficiency; if the ambient temperature is higher than the first preset temperature, it indicates that the outside temperature is high, and a heat pump heating mode is used to reduce power consumption. The first preset temperature is determined based on experimental data, and this application does not impose a specific limitation on it.

[0068] Furthermore, the heat pump system includes a compressor and a compressor electric heating belt; before controlling the heat pump system to operate for heating, the control module confirms whether to turn on the compressor electric heating belt based on the ambient temperature; if the ambient temperature is lower than a second preset temperature after the compressor has been started for a preset time, the control module adjusts the operating frequency of the compressor.

[0069] Specifically, the compressor releases high-temperature heat by compressing the refrigerant. The compressor's electric heating element is used to heat the refrigerant and lubricating oil inside the compressor. When the heat pump stops or the ambient temperature is low, the liquid refrigerant inside the compressor may condense and dissolve into the crankcase lubricating oil, leading to compressor wear or even cylinder seizure. The compressor's electric heating element evaporates the dissolved refrigerant and preheats the lubricating oil, ensuring the lubrication system functions properly when the compressor starts.

[0070] Therefore, as Figure 3 As shown, when the heat pump system is running in heating mode, the electric heating element of the compressor is stopped.

[0071] Specifically, if the ambient temperature is lower than the second preset temperature after the compressor has been running for a period of time, it indicates that the heating efficiency of the heat pump system is low and needs to be improved. The compressor's operating frequency directly affects the refrigerant circulation flow rate, and thus the heating efficiency of the heat pump system. In this case, increasing the compressor's operating frequency can be chosen.

[0072] Furthermore, the second preset temperature can be the same as or different from the first preset temperature. The preset time is related to the initial ambient temperature, the second preset temperature, and the compressor's operating frequency; the specific correspondence is determined based on experimental data.

[0073] In summary, this utility model provides an electric heating device for track air conditioning and a track air conditioner, which has the following advantages compared with the prior art:

[0074] The electric heating device for track air conditioning provided by this utility model divides the main circuit into a first group of heating circuits and a second group of heating circuits connected in parallel, and sets two-stage temperature control switches on each of the two groups of heating circuits. This allows the other group of heating circuits to be activated immediately when the temperature of one group of heating circuits overheats, improving the reliability of the electric heating device. Furthermore, the electric heating device for track air conditioning provided by this utility model only adds temperature control switches to the original electric heating device, without the need for additional components or extra installation space, thus reducing production costs. The track air conditioner provided by this utility model also adjusts the heating mode of the track air conditioner according to the ambient temperature, controlling the operation of the heat pump system or the electric heating device. This allows the track air conditioner to heat in electric heating mode at low temperatures, improving heating efficiency; and to heat pump mode at high temperatures, reducing power consumption and saving heating costs.

[0075] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A track air conditioning electric heating device, characterized in that, include: The main circuit, used for heating, includes a first heating circuit and a second heating circuit; A control loop is used to control the main circuit, including a first control loop and a second control loop, wherein the first control loop and the second control loop control the first group of heating circuits and the second group of heating circuits, respectively. The input terminals of the first group of heating circuits and the second group of heating circuits are connected in parallel and then connected to the input power supply of the main circuit. The first group of heating circuits and the second group of heating circuits can be controlled independently.

2. The track air conditioning electric heating device according to claim 1, characterized in that, The first heating circuit includes a first contactor, a first heating component, a first-level temperature control switch, and a first-level temperature control switch; The second heating circuit includes a second contactor, a second heating component, a second primary temperature control switch, and a second secondary temperature control switch.

3. The track air conditioning electric heating device according to claim 2, characterized in that, The first-level temperature control switch and the first-level temperature control switch act on the first control circuit and the first group of heating circuits, respectively. When either the first-level temperature control switch or the first-level temperature control switch is disconnected, the first group of heating circuits malfunctions. The second-level temperature control switch and the second-secondary temperature control switch act on the second control circuit and the second group of heating circuits, respectively. When either the second-level temperature control switch or the second-secondary temperature control switch is disconnected, the second group of heating circuits malfunctions.

4. The track air conditioning electric heating device according to claim 3, characterized in that, In the first heating circuit, the operating temperatures of the first-stage temperature control switch and the first-stage temperature control switch are different; In the second heating circuit, the operating temperatures of the second-level temperature control switch and the second-level temperature control switch are different.

5. The track air conditioning electric heating device according to claim 2, characterized in that, The first heating component and the second heating component may have the same or different power.

6. The track air conditioning electric heating device according to claim 2, characterized in that, It also includes, The control unit is used to send control signals to the first contactor and / or the second contactor to control the operating state of the first group of heating circuits and / or the second group of heating circuits.

7. The track air conditioning electric heating device according to claim 5, characterized in that, The first heating circuit also includes a first circuit breaker, which is connected in series with the first contactor, the first heating component, and the first secondary temperature control switch. The second heating circuit also includes a second circuit breaker, which is connected in series with the second contactor, the second heating component, and the second secondary temperature control switch.

8. A track-mounted air conditioner, characterized in that, The track air conditioner is equipped with a track air conditioner electric heating device as described in any one of claims 1-7.

9. The track air conditioner according to claim 8, characterized in that, It also includes, Heat pump system; Temperature detection module, used to detect ambient temperature; The control module is used to control the track air conditioner electric heating device to operate and heat if the ambient temperature is lower than the first preset temperature, and to control the heat pump system to operate and heat if the ambient temperature is higher than the first preset temperature.

10. The track air conditioner according to claim 9, characterized in that, The heat pump system includes a compressor and a compressor electric heating belt; Before controlling the heat pump system to operate for heating, the control module determines whether to turn on the compressor electric heating belt based on the ambient temperature; If the ambient temperature is lower than a second preset temperature after the compressor has been started for a preset time, the operating frequency of the compressor will be adjusted accordingly.

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